1 /*
2 * net/tipc/netlink.c: TIPC configuration handling
3 *
4 * Copyright (c) 2005-2006, 2014, Ericsson AB
5 * Copyright (c) 2005-2007, Wind River Systems
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the names of the copyright holders nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37 #include "core.h"
38 #include "socket.h"
39 #include "name_table.h"
40 #include "bearer.h"
41 #include "link.h"
42 #include "node.h"
43 #include "net.h"
44 #include "udp_media.h"
45 #include <net/genetlink.h>
46
47 static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = {
48 [TIPC_NLA_UNSPEC] = { .type = NLA_UNSPEC, },
49 [TIPC_NLA_BEARER] = { .type = NLA_NESTED, },
50 [TIPC_NLA_SOCK] = { .type = NLA_NESTED, },
51 [TIPC_NLA_PUBL] = { .type = NLA_NESTED, },
52 [TIPC_NLA_LINK] = { .type = NLA_NESTED, },
53 [TIPC_NLA_MEDIA] = { .type = NLA_NESTED, },
54 [TIPC_NLA_NODE] = { .type = NLA_NESTED, },
55 [TIPC_NLA_NET] = { .type = NLA_NESTED, },
56 [TIPC_NLA_NAME_TABLE] = { .type = NLA_NESTED, },
57 [TIPC_NLA_MON] = { .type = NLA_NESTED, },
58 };
59
60 const struct nla_policy
61 tipc_nl_name_table_policy[TIPC_NLA_NAME_TABLE_MAX + 1] = {
62 [TIPC_NLA_NAME_TABLE_UNSPEC] = { .type = NLA_UNSPEC },
63 [TIPC_NLA_NAME_TABLE_PUBL] = { .type = NLA_NESTED }
64 };
65
66 const struct nla_policy tipc_nl_monitor_policy[TIPC_NLA_MON_MAX + 1] = {
67 [TIPC_NLA_MON_UNSPEC] = { .type = NLA_UNSPEC },
68 [TIPC_NLA_MON_REF] = { .type = NLA_U32 },
69 [TIPC_NLA_MON_ACTIVATION_THRESHOLD] = { .type = NLA_U32 },
70 };
71
72 const struct nla_policy tipc_nl_sock_policy[TIPC_NLA_SOCK_MAX + 1] = {
73 [TIPC_NLA_SOCK_UNSPEC] = { .type = NLA_UNSPEC },
74 [TIPC_NLA_SOCK_ADDR] = { .type = NLA_U32 },
75 [TIPC_NLA_SOCK_REF] = { .type = NLA_U32 },
76 [TIPC_NLA_SOCK_CON] = { .type = NLA_NESTED },
77 [TIPC_NLA_SOCK_HAS_PUBL] = { .type = NLA_FLAG }
78 };
79
80 const struct nla_policy tipc_nl_net_policy[TIPC_NLA_NET_MAX + 1] = {
81 [TIPC_NLA_NET_UNSPEC] = { .type = NLA_UNSPEC },
82 [TIPC_NLA_NET_ID] = { .type = NLA_U32 },
83 [TIPC_NLA_NET_ADDR] = { .type = NLA_U32 },
84 [TIPC_NLA_NET_NODEID] = { .type = NLA_U64 },
85 [TIPC_NLA_NET_NODEID_W1] = { .type = NLA_U64 },
86 [TIPC_NLA_NET_ADDR_LEGACY] = { .type = NLA_FLAG }
87 };
88
89 const struct nla_policy tipc_nl_link_policy[TIPC_NLA_LINK_MAX + 1] = {
90 [TIPC_NLA_LINK_UNSPEC] = { .type = NLA_UNSPEC },
91 [TIPC_NLA_LINK_NAME] = { .type = NLA_NUL_STRING,
92 .len = TIPC_MAX_LINK_NAME },
93 [TIPC_NLA_LINK_MTU] = { .type = NLA_U32 },
94 [TIPC_NLA_LINK_BROADCAST] = { .type = NLA_FLAG },
95 [TIPC_NLA_LINK_UP] = { .type = NLA_FLAG },
96 [TIPC_NLA_LINK_ACTIVE] = { .type = NLA_FLAG },
97 [TIPC_NLA_LINK_PROP] = { .type = NLA_NESTED },
98 [TIPC_NLA_LINK_STATS] = { .type = NLA_NESTED },
99 [TIPC_NLA_LINK_RX] = { .type = NLA_U32 },
100 [TIPC_NLA_LINK_TX] = { .type = NLA_U32 }
101 };
102
103 const struct nla_policy tipc_nl_node_policy[TIPC_NLA_NODE_MAX + 1] = {
104 [TIPC_NLA_NODE_UNSPEC] = { .type = NLA_UNSPEC },
105 [TIPC_NLA_NODE_ADDR] = { .type = NLA_U32 },
106 [TIPC_NLA_NODE_UP] = { .type = NLA_FLAG },
107 [TIPC_NLA_NODE_ID] = { .type = NLA_BINARY,
108 .len = TIPC_NODEID_LEN},
109 [TIPC_NLA_NODE_KEY] = { .type = NLA_BINARY,
110 .len = TIPC_AEAD_KEY_SIZE_MAX},
111 [TIPC_NLA_NODE_KEY_MASTER] = { .type = NLA_FLAG },
112 [TIPC_NLA_NODE_REKEYING] = { .type = NLA_U32 },
113 };
114
115 /* Properties valid for media, bearer and link */
116 static const struct netlink_range_validation tipc_nl_mtu_range = {
117 .max = U16_MAX,
118 };
119
120 const struct nla_policy tipc_nl_prop_policy[TIPC_NLA_PROP_MAX + 1] = {
121 [TIPC_NLA_PROP_UNSPEC] = { .type = NLA_UNSPEC },
122 [TIPC_NLA_PROP_PRIO] = { .type = NLA_U32 },
123 [TIPC_NLA_PROP_TOL] = { .type = NLA_U32 },
124 [TIPC_NLA_PROP_WIN] = { .type = NLA_U32 },
125 [TIPC_NLA_PROP_MTU] = NLA_POLICY_FULL_RANGE(NLA_U32, &tipc_nl_mtu_range),
126 [TIPC_NLA_PROP_BROADCAST] = { .type = NLA_U32 },
127 [TIPC_NLA_PROP_BROADCAST_RATIO] = { .type = NLA_U32 }
128 };
129
130 const struct nla_policy tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1] = {
131 [TIPC_NLA_BEARER_UNSPEC] = { .type = NLA_UNSPEC },
132 [TIPC_NLA_BEARER_NAME] = { .type = NLA_NUL_STRING,
133 .len = TIPC_MAX_BEARER_NAME },
134 [TIPC_NLA_BEARER_PROP] = { .type = NLA_NESTED },
135 [TIPC_NLA_BEARER_DOMAIN] = { .type = NLA_U32 }
136 };
137
138 const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = {
139 [TIPC_NLA_MEDIA_UNSPEC] = { .type = NLA_UNSPEC },
140 [TIPC_NLA_MEDIA_NAME] = { .type = NLA_STRING },
141 [TIPC_NLA_MEDIA_PROP] = { .type = NLA_NESTED }
142 };
143
144 const struct nla_policy tipc_nl_udp_policy[TIPC_NLA_UDP_MAX + 1] = {
145 [TIPC_NLA_UDP_UNSPEC] = {.type = NLA_UNSPEC},
146 [TIPC_NLA_UDP_LOCAL] = {.type = NLA_BINARY,
147 .len = sizeof(struct sockaddr_storage)},
148 [TIPC_NLA_UDP_REMOTE] = {.type = NLA_BINARY,
149 .len = sizeof(struct sockaddr_storage)},
150 };
151
152 /* Users of the legacy API (tipc-config) can't handle that we add operations,
153 * so we have a separate genl handling for the new API.
154 */
155 static const struct genl_ops tipc_genl_v2_ops[] = {
156 {
157 .cmd = TIPC_NL_BEARER_DISABLE,
158 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
159 .flags = GENL_UNS_ADMIN_PERM,
160 .doit = tipc_nl_bearer_disable,
161 },
162 {
163 .cmd = TIPC_NL_BEARER_ENABLE,
164 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
165 .flags = GENL_UNS_ADMIN_PERM,
166 .doit = tipc_nl_bearer_enable,
167 },
168 {
169 .cmd = TIPC_NL_BEARER_GET,
170 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
171 .doit = tipc_nl_bearer_get,
172 .dumpit = tipc_nl_bearer_dump,
173 },
174 {
175 .cmd = TIPC_NL_BEARER_ADD,
176 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
177 .flags = GENL_UNS_ADMIN_PERM,
178 .doit = tipc_nl_bearer_add,
179 },
180 {
181 .cmd = TIPC_NL_BEARER_SET,
182 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
183 .flags = GENL_UNS_ADMIN_PERM,
184 .doit = tipc_nl_bearer_set,
185 },
186 {
187 .cmd = TIPC_NL_SOCK_GET,
188 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
189 .start = tipc_dump_start,
190 .dumpit = tipc_nl_sk_dump,
191 .done = tipc_dump_done,
192 },
193 {
194 .cmd = TIPC_NL_PUBL_GET,
195 .validate = GENL_DONT_VALIDATE_STRICT |
196 GENL_DONT_VALIDATE_DUMP_STRICT,
197 .dumpit = tipc_nl_publ_dump,
198 },
199 {
200 .cmd = TIPC_NL_LINK_GET,
201 .validate = GENL_DONT_VALIDATE_STRICT,
202 .doit = tipc_nl_node_get_link,
203 .dumpit = tipc_nl_node_dump_link,
204 },
205 {
206 .cmd = TIPC_NL_LINK_SET,
207 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
208 .flags = GENL_UNS_ADMIN_PERM,
209 .doit = tipc_nl_node_set_link,
210 },
211 {
212 .cmd = TIPC_NL_LINK_RESET_STATS,
213 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
214 .flags = GENL_UNS_ADMIN_PERM,
215 .doit = tipc_nl_node_reset_link_stats,
216 },
217 {
218 .cmd = TIPC_NL_MEDIA_GET,
219 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
220 .doit = tipc_nl_media_get,
221 .dumpit = tipc_nl_media_dump,
222 },
223 {
224 .cmd = TIPC_NL_MEDIA_SET,
225 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
226 .flags = GENL_UNS_ADMIN_PERM,
227 .doit = tipc_nl_media_set,
228 },
229 {
230 .cmd = TIPC_NL_NODE_GET,
231 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
232 .dumpit = tipc_nl_node_dump,
233 },
234 {
235 .cmd = TIPC_NL_NET_GET,
236 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
237 .dumpit = tipc_nl_net_dump,
238 },
239 {
240 .cmd = TIPC_NL_NET_SET,
241 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
242 .flags = GENL_UNS_ADMIN_PERM,
243 .doit = tipc_nl_net_set,
244 },
245 {
246 .cmd = TIPC_NL_NAME_TABLE_GET,
247 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
248 .dumpit = tipc_nl_name_table_dump,
249 },
250 {
251 .cmd = TIPC_NL_MON_SET,
252 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
253 .flags = GENL_UNS_ADMIN_PERM,
254 .doit = tipc_nl_node_set_monitor,
255 },
256 {
257 .cmd = TIPC_NL_MON_GET,
258 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
259 .doit = tipc_nl_node_get_monitor,
260 .dumpit = tipc_nl_node_dump_monitor,
261 },
262 {
263 .cmd = TIPC_NL_MON_PEER_GET,
264 .validate = GENL_DONT_VALIDATE_STRICT |
265 GENL_DONT_VALIDATE_DUMP_STRICT,
266 .dumpit = tipc_nl_node_dump_monitor_peer,
267 },
268 {
269 .cmd = TIPC_NL_PEER_REMOVE,
270 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
271 .flags = GENL_UNS_ADMIN_PERM,
272 .doit = tipc_nl_peer_rm,
273 },
274 #ifdef CONFIG_TIPC_MEDIA_UDP
275 {
276 .cmd = TIPC_NL_UDP_GET_REMOTEIP,
277 .validate = GENL_DONT_VALIDATE_STRICT |
278 GENL_DONT_VALIDATE_DUMP_STRICT,
279 .dumpit = tipc_udp_nl_dump_remoteip,
280 },
281 #endif
282 #ifdef CONFIG_TIPC_CRYPTO
283 {
284 .cmd = TIPC_NL_KEY_SET,
285 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
286 .flags = GENL_UNS_ADMIN_PERM,
287 .doit = tipc_nl_node_set_key,
288 },
289 {
290 .cmd = TIPC_NL_KEY_FLUSH,
291 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
292 .flags = GENL_UNS_ADMIN_PERM,
293 .doit = tipc_nl_node_flush_key,
294 },
295 #endif
296 {
297 .cmd = TIPC_NL_ADDR_LEGACY_GET,
298 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
299 .doit = tipc_nl_net_addr_legacy_get,
300 },
301 };
302
303 struct genl_family tipc_genl_family __ro_after_init = {
304 .name = TIPC_GENL_V2_NAME,
305 .version = TIPC_GENL_V2_VERSION,
306 .hdrsize = 0,
307 .maxattr = TIPC_NLA_MAX,
308 .policy = tipc_nl_policy,
309 .netnsok = true,
310 .module = THIS_MODULE,
311 .ops = tipc_genl_v2_ops,
312 .n_ops = ARRAY_SIZE(tipc_genl_v2_ops),
313 .resv_start_op = TIPC_NL_ADDR_LEGACY_GET + 1,
314 };
315
tipc_netlink_start(void)316 int __init tipc_netlink_start(void)
317 {
318 int res;
319
320 res = genl_register_family(&tipc_genl_family);
321 if (res) {
322 pr_err("Failed to register netlink interface\n");
323 return res;
324 }
325 return 0;
326 }
327
tipc_netlink_stop(void)328 void tipc_netlink_stop(void)
329 {
330 genl_unregister_family(&tipc_genl_family);
331 }
332